Processing technology of surface glue spraying fire-retardant sponge
By using a multi-layered structure and specialized sponge foaming equipment, the problem of heat overload during sponge production was solved, enabling a safe and efficient sponge molding and demolding process.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- HUBEI SHIFENG NEW MATERIALS CO LTD
- Filing Date
- 2024-05-10
- Publication Date
- 2026-05-15
AI Technical Summary
The production process of sponges generates a lot of heat, which means that air needs to be replaced during the foaming and molding process. Otherwise, the sponge will burst. Existing equipment has low safety and cannot effectively control the air input efficiency.
The process of using surface-sprayed flame-retardant sponge includes a combination structure of a first insulation layer, a flame-retardant layer, an antibacterial layer, and a puncture-resistant layer. The sponge is multi-layered through a spraying process, and the foaming sponge component and pressure sensing component in the flame-retardant sponge foaming equipment are used to control the air injection and sponge expansion process.
It enables safe control of the sponge production process, prevents the sponge from bursting, improves air input efficiency, facilitates observation and automatic control of airflow replacement, and ensures the safety and quality of sponge molding.
Smart Images
Figure CN118438772B_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of sponge processing technology, and in particular to a processing technology for a surface-sprayed flame-retardant sponge. Background Technology
[0002] Flame-retardant sponge is a type of sponge material with flame-retardant properties, typically used in applications requiring fire resistance or flame retardancy. Flame retardants are added during the manufacturing process to enhance its flame-retardant performance, thereby slowing the spread of fire or preventing its spread in the event of a fire or high temperatures.
[0003] The publicly available patent document CN212978979U discloses a high flame-retardant polyurethane sponge foaming molding and curing device, including bottom movable wheels. A top connecting plate is fixedly installed on the top of the bottom movable wheels. A storage box is placed on the top of the top connecting plate. Limiting rods are snapped onto both sides of the outer wall of the storage box. A connecting sleeve rod is movably installed on the top of the storage box. Through the designed lifting rod, the sponge moves upward. During the movement, the sponge comes into contact with the surface of the outer wall of the connecting push plate. During the contact process, the sponge pushes the connecting push plate upward. During the pushing process, the lifting rod moves upward. At this time, the operator can judge whether the sponge has been formed based on the extension length of the lifting rod, avoiding the need for manual judgment and solving the problem of manual judgment.
[0004] When the above device is in use, the lifting rod will move upward during the pushing process. At this time, the operator can judge whether the sponge has been formed by the length of the extension of the lifting rod. However, the sponge will generate a lot of heat during the production process. The above device uses the heat generated by the foaming process to make the judgment. However, the air needs to be replaced during the foaming process, otherwise the sponge will burst. The above device has low safety and cannot control the air input efficiency well.
[0005] Therefore, this application proposes a processing technology for surface-sprayed flame-retardant sponge. Summary of the Invention
[0006] The purpose of this invention is to address the problems in the prior art where sponges generate a large amount of heat during production, require air replacement during foaming and molding to prevent the sponge from bursting, and the aforementioned devices have low safety and cannot effectively control air input efficiency. The invention proposes a processing technology for surface-sprayed flame-retardant sponges.
[0007] The technical solution of the present invention: a surface-sprayed flame-retardant sponge, comprising a first insulation layer, a flame-retardant layer, an antibacterial layer, two puncture-resistant layers, and a second insulation layer, wherein the first insulation layer, the flame-retardant layer, the antibacterial layer, the puncture-resistant layer, and the second insulation layer are all made of ammonium polyphosphate, and ammonium polyphosphate flame retardant is added to the ammonium polyphosphate. The assembly sequence of the surface-sprayed flame-retardant sponge is composed of one puncture-resistant layer, the first insulation layer, the flame-retardant layer, the antibacterial layer, the second insulation layer, and another puncture-resistant layer by spraying adhesive.
[0008] Solid perlite material is added to the first and second insulation layers, antibacterial foamed polyurethane is added to the antibacterial layer, and wood cellulose fiber is added to the two puncture-resistant layers.
[0009] Meanwhile, a processing technology for surface-sprayed flame-retardant sponge is proposed, including a flame-retardant sponge foaming equipment. The flame-retardant sponge foaming equipment includes a foamed sponge component, a pressing valve component rotatably connected inside the foamed sponge component, and a pressure sensing component slidably connected inside the foamed sponge component.
[0010] The foamed sponge assembly includes a venting plate, the surface of which has multiple venting holes, and multiple sealing sheets are hinged inside the venting holes.
[0011] The pressure sensing component includes a pressure transmission rod, with an external collar fixedly connected to the bottom end of the pressure transmission rod. An internal limiting ring is slidably connected to the outer surface of the external collar via a limiting friction block. The internal limiting ring is fixedly connected to the inside of the vent plate. Multiple inclined short rods are hinged to the end of the external collar away from the pressure transmission rod. One end of the multiple inclined short rods is slidably connected to one side of the vent plate via a limiting slide. A limiting friction block is fixedly connected to the bottom end of the external collar. Multiple air guide blocks corresponding to the vent holes are fixedly connected to the top end of the pressure push block.
[0012] Optionally, a limiting ring is fixedly connected to the outer surface of the inclined short rod, and multiple long strips are fixedly connected to the outer surface of the limiting ring. A long tube is fixedly connected to one end of the long strips facing the ventilator plate, and a hollow storage tube is slidably connected to the bottom end of the long tube. The hollow storage tube is fixedly connected to the top of the ventilator plate.
[0013] Optionally, the foamed sponge assembly includes a foamed sponge box, which is fixedly installed at the bottom of the ventilation plate. A release template is slidably connected to the bottom of the foamed sponge box. Side plates are fixedly installed on both sides of the foamed sponge box. One end of the placement groove is connected to a bolt by a thread, and a connecting rod is fixedly connected to one side of the bolt. The connecting rod is fixedly installed on one side of the release template.
[0014] Optionally, the pressure valve assembly includes a sealing ring, which is fixedly mounted on a side plate. A forward and reverse motor is rotatably connected to the inner side of the sealing ring. An internal ring is fixedly connected to the internal side of the forward and reverse motor inside the foamed sponge box. A slide block is fixedly connected to the inside of the internal ring. A movable plate is slidably connected to the inner side of the slide block. An inclined plate is hinged to the inner side of the movable plate. A pressure rod is hinged to one side of the inclined plate.
[0015] Optionally, a valve is slidably connected to the end of the pressure rod away from the forward and reverse motor, and a sponge molding plate is fixedly connected to the end of the pressure rod away from the forward and reverse motor. The sponge molding plate is slidably connected to the foamed sponge box via a slide rail. An internal block with a pressing groove on its surface is fixedly connected to one side of the valve, and a connecting long rod adapted to the pressing groove is fixedly connected to the outside of the pressure rod.
[0016] A processing method for a flame-retardant sponge with surface adhesive spraying includes the following steps:
[0017] S1: Select ammonium polyphosphate, solid perlite material, antibacterial polyurethane foam and wood cellulose and process them separately according to the requirements of the first insulation layer, flame retardant layer, antibacterial layer, two puncture-proof layers and the second insulation layer. At the same time, add ammonium polyphosphate flame retardant inside the above materials.
[0018] S2: Mix the above materials evenly to ensure that the flame retardant properties are evenly distributed throughout the entire sponge structure;
[0019] S3: The mixed raw materials are layered and fed into the mold for molding. The material is added to the foaming sponge box according to the requirements. The pressure pusher moves the pressure transmission rod upward through the external collar, causing the sealing sheet to bloom and gradually give up blocking the air hole. Air is gradually introduced into the foaming sponge box according to the expansion degree of the sponge.
[0020] S4: Next, the flame-retardant sponge after molding is cured. The sponge molding plate is subjected to the pressure of the sponge foam expansion and moves outward along the sponge molding plate under the limit of the spring force. The sponge molding plate drives the pressure rod to move in the direction of the pressing groove. The valve moves outward through the threaded lead, and the valve is fully opened to relieve the internal pressure.
[0021] S5: To increase the durability and aesthetics of the flame-retardant sponge, each surface is sprayed with adhesive in the following order: a puncture-resistant layer, a first insulation layer, a flame-retardant layer, an antibacterial layer, a second insulation layer, and another puncture-resistant layer to complete the multi-layer flame-retardant sponge.
[0022] S6: Cut the finished sponge according to the model requirements and package the cut sponge.
[0023] Compared with the prior art, the present invention has the following beneficial technical effects:
[0024] 1. During the upward movement of the external collar, the inclined short rod slides along the position of the limiting slide, which limits the upward movement height of the pressure transmission long rod. At the same time, the pressure push block gradually drives the air guide push block to squeeze the sealing plate in the vent hole, causing the sealing plate to bloom and gradually give up blocking the vent hole. This allows for better control of air input based on the expansion of the sponge, making it easier for staff to observe the sponge production status while automatically controlling the airflow replacement.
[0025] 2. The sponge molding board drives the pressure rod to move towards the pressing groove. At this time, the connecting rod is stuck inside the pressing groove, and then the pressing groove rotates. At this time, the valve moves outward through the threaded guide, fully opening the valve and relieving the internal pressure, which facilitates the demolding process of the sponge product and makes it easier to control the pressure during foaming. Attached Figure Description
[0026] Figure 1 A schematic diagram of the foaming device of the present invention is provided;
[0027] Figure 2 The present invention is given Figure 2 Enlarged view of part A in the middle;
[0028] Figure 3 A schematic diagram of the sealing sheet of the present invention is provided;
[0029] Figure 4 A schematic diagram of the pressure transmission rod of the present invention is provided;
[0030] Figure 5 The present invention is given Figure 5 Enlarged view of part B in the middle;
[0031] Figure 6 The present invention is given Figure 5 Enlarged view of part C in the middle;
[0032] Figure 7 The present invention is given Figure 5 Enlarged view of part D in the middle.
[0033] Reference numerals: 1. Foamed sponge assembly; 101. Foamed sponge box; 102. Placement groove; 103. Side panel; 104. Bolt buckle; 105. Connecting rod; 106. Demolding template; 107. Vent plate; 108. Vent hole; 109. Sealing plate; 2. Press-fit valve assembly; 201. Forward and reverse motor; 202. Sealing ring; 203. Sponge molding board; 204. Valve; 205. Spring; 206. Pressure rod; 207. Connecting rod; 208. Inner... 209. Pressing groove; 210. Inclined plate; 211. Movable plate; 212. Slide rail block; 213. Built-in ring; 3. Pressure sensing component; 301. Pressure transmission rod; 302. Long strip block; 303. Long tube; 304. Hollow tube storage; 305. Limiting ring; 306. External collar; 307. Limiting friction block; 308. Built-in limiting ring; 309. Pressure push block; 310. Inclined short rod; 311. Limiting slide; 312. Air guide push block. Detailed Implementation
[0034] The technical solution of the present invention will be further described below with reference to the accompanying drawings and specific embodiments. Example 1
[0035] like Figures 1-4 As shown, the present invention comprises a first insulation layer, a flame retardant layer, an antibacterial layer, two puncture-resistant layers, and a second insulation layer. The first insulation layer, the flame retardant layer, the antibacterial layer, the puncture-resistant layer, and the second insulation layer are all made of ammonium polyphosphate, and an ammonium polyphosphate flame retardant is added to the ammonium polyphosphate. The assembly sequence of the flame-retardant sponge with surface adhesive is as follows: one puncture-resistant layer, the first insulation layer, the flame retardant layer, the antibacterial layer, the second insulation layer, and another puncture-resistant layer.
[0036] Solid perlite material is added to the first and second insulation layers, antibacterial foamed polyurethane is added to the antibacterial layer, and wood cellulose fiber is added to the two puncture-resistant layers.
[0037] In this embodiment, the flame-retardant sponge foaming equipment includes a foamed sponge assembly 1, a snap-fit valve assembly 2 rotatably connected inside the foamed sponge assembly 1, and a pressure sensing assembly 3 slidably connected inside the foamed sponge assembly 1.
[0038] The foamed sponge assembly 1 includes a ventilation plate 107, the surface of which is provided with a plurality of ventilation holes 108, and a plurality of sealing sheets 109 are hinged inside the ventilation holes 108.
[0039] The pressure sensing component 3 includes a pressure transmission rod 301. An external collar 306 is fixedly connected to the bottom end of the pressure transmission rod 301. An internal limiting ring 308 is slidably connected to the outer surface of the external collar 306 via a limiting friction block 307. The internal limiting ring 308 is fixedly connected to the inside of the vent plate 107. Multiple inclined short rods 310 are hinged to the end of the external collar 306 away from the pressure transmission rod 301. One end of each inclined short rod 310 is slidably connected to one side of the vent plate 107 via a limiting slide 311. The limiting friction block 307 is fixedly connected to the bottom end of the external collar 306. Multiple air-guiding push blocks 312, corresponding to the positions of the vent holes 108, are fixedly connected to the top end of the pressure push block 309. During the foaming process of the sponge material inside the foaming sponge box 101, a large amount of heat is gradually generated. As it gradually expands outwards, it is necessary to... As the sponge expands and airflow is channeled, it compresses the pressure pusher 309. The pressure pusher 309 uses the friction between the limiting friction block 307 and the built-in limiting ring 308 to offset the impact from below, preventing rapid air exchange and insufficient heat for sponge foaming. As the outer collar 306 moves the pressure transmission rod 301 upward, the inclined short rod 310 slides along the limiting slide 311 during the upward movement of the outer collar 306, limiting the upward height of the pressure transmission rod 301. At the same time, the pressure pusher 309 gradually drives the air guide pusher 312 to compress the sealing sheet 109 in the vent hole 108, causing the sealing sheet 109 to bloom and gradually give way to the vent hole 108. This allows for better control of air input based on the sponge expansion, facilitating workers to observe the sponge production process while automatically controlling airflow exchange.
[0040] After the sponge production is completed, the staff will press the pressure transmission rod 301 back to its original position. At the same time, since the sealing plate 109 is a relatively heavy copper plate, its center of gravity is set downwards. After the external thrust is lost, it will return to its original position according to gravity.
[0041] The outer surface of the inclined short rod 310 is fixedly connected to a limiting ring 305. Multiple long strips 302 are fixedly connected to the outer surface of the limiting ring 305. A long tube 303 is fixedly connected to one end of the long strip 302 facing the vent plate 107. A hollow tube 304 is slidably connected to the bottom end of the long tube 303. The hollow tube 304 is fixedly connected to the top of the vent plate 107. When the pressure transmission rod 301 slides on the vent plate 107, the pressure transmission rod 301 drives the long strips 302 to move up and down synchronously through the limiting ring 305. At the same time, the long strips 302 drive the long tube 303 to slide synchronously along the hollow tube 304, thereby limiting the sliding distance of the pressure transmission rod 301. Example 2
[0042] like Figure 1-2As shown, based on Embodiment 1, the foamed sponge assembly 1 includes a foamed sponge box 101, which is fixedly installed at the bottom of the ventilation plate 107. A demolding template 106 is slidably connected to the bottom of the foamed sponge box 101. Side plates 103 are fixedly installed on both sides of the foamed sponge box 101. One end of the placement groove 102 is connected to a bolt buckle 104 by a thread. A connecting rod 105 is rotatably connected to one side of the bolt buckle 104. The connecting rod 105 is fixedly installed on one side of the demolding template 106. When the worker twists the bolt buckle 104, the bolt buckle 104 disengages from the placement groove 102, causing the demolding template 106 to lose its positioning, and the molded sponge can be quickly demolded. Example 3
[0043] like Figures 1-7 As shown, based on the above embodiment 1 or 2, the clamping valve assembly 2 includes a sealing ring 202, which is fixedly installed on the side plate 103. A forward and reverse motor 201 is rotatably connected to the inner side of the sealing ring 202. The forward and reverse motor 201 is located inside the foamed sponge box 101 and is fixedly connected to an inner ring 213. A slide rail block 212 is fixedly connected inside the inner ring 213. A movable plate 211 is slidably connected to the inner side of the slide rail block 212. An inclined plate 210 is hinged to the inner side of the movable plate 211. A pressure rod 206 is hinged to one side of the plate 210. When the pressure rod 206 slides toward the position of the forward and reverse motor 201, the pressure rod 206 drives the inclined plate 210 and the movable plate 211 to move along the inner wall of the inner ring 213. The movable plate 211 is provided with a pressure sensor control switch toward the position of the inner ring 213. The forward and reverse motor 201 is driven to rotate its output shaft when it receives a command. The movable plate 211 and the inner wall of the slide block 212 are in close contact to generate friction, causing the pressure rod 206 to rotate synchronously.
[0044] In this embodiment, a valve 204 is slidably connected to the end of the pressure rod 206 away from the reversible motor 201. The valve 204 is slidably connected to the inner wall of the foamed sponge box 101. A sponge molding plate 203 is fixedly connected to the end of the pressure rod 206 away from the reversible motor 201. The sponge molding plate 203 is slidably connected to the foamed sponge box 101 via a slide rail. An internal block 208 with a pressing groove 209 on its surface is threadedly connected to one side of the valve 204. A connector adapted to the pressing groove 209 is fixedly connected to the outer side of the pressure rod 206. The long rod 207, along with the sponge molding plate 203, moves outward under the pressure of the sponge foam expansion, limited by the elastic force of the spring 205. The sponge molding plate 203 drives the pressure rod 206 to move towards the pressing groove 209. At this time, the connecting long rod 207 is stuck inside the pressing groove 209, and the pressing groove 209 rotates. At this time, the valve 204 moves outward through the threaded lead, fully opening the valve and relieving the internal pressure, thus facilitating the demolding process of the finished sponge and making it easier to control the pressure during foaming.
[0045] A processing method for a flame-retardant sponge with surface adhesive spraying includes the following steps:
[0046] S1: Select ammonium polyphosphate, solid perlite material, antibacterial polyurethane foam and wood cellulose and process them separately according to the requirements of the first insulation layer, flame retardant layer, antibacterial layer, two puncture-proof layers and the second insulation layer. At the same time, add ammonium polyphosphate flame retardant inside the above materials.
[0047] S2: Mix the above materials evenly to ensure that the flame retardant properties are evenly distributed throughout the entire sponge structure;
[0048] S3: The mixed raw materials are layered and fed into the mold for molding. The material is added to the foaming sponge box 101 according to the requirements. The pressure pusher 309 drives the pressure transmission rod 301 to move upward through the external collar 306, causing the sealing sheet 109 to bloom and gradually give up blocking the vent hole 108. Air is gradually introduced into the foaming sponge box 101 according to the expansion degree of the sponge.
[0049] S4: Next, the molded flame-retardant sponge is cured. The sponge molding plate 203 is subjected to the pressure of the sponge foam expansion and moves outward along the sponge molding plate 203 under the elastic limit of the spring 205. The sponge molding plate 203 drives the pressure rod 206 to move towards the pressing groove 209. The valve 204 moves outward through the threaded lead, completely opening the valve and relieving the internal pressure.
[0050] S5: To increase the durability and aesthetics of the flame-retardant sponge, each surface is sprayed with adhesive in the following order: a puncture-resistant layer, a first insulation layer, a flame-retardant layer, an antibacterial layer, a second insulation layer, and another puncture-resistant layer to complete the multi-layer flame-retardant sponge.
[0051] S6: Cut the finished sponge according to the model requirements and package the cut sponge.
[0052] It should be noted that in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "including,"
[0053] "Include" or any other variation thereof is intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.
[0054] The above specific embodiments are merely several optional embodiments of the present invention. Based on the technical solutions of the present invention and the relevant teachings of the above embodiments, those skilled in the art can make various alternative improvements and combinations to the above specific embodiments.
Claims
1. A processing technology for a surface-sprayed flame-retardant sponge, comprising flame-retardant sponge foaming equipment, characterized in that, The flame-retardant foaming equipment includes a foaming sponge assembly (1), a snap valve assembly (2) rotatably connected inside the foaming sponge assembly (1), and a pressure sensing assembly (3) slidably connected inside the foaming sponge assembly (1). The foamed sponge assembly (1) includes a ventilation plate (107), the surface of which is provided with a plurality of ventilation holes (108), and a plurality of sealing sheets (109) are hinged inside the ventilation holes (108). The pressure sensing component (3) includes a pressure transmission rod (301), the bottom end of which is fixedly connected to an external collar (306). The outer surface of the external collar (306) is slidably connected to an internal limiting ring (308) via a limiting friction block (307). The internal limiting ring (308) is fixedly connected to the inside of the vent plate (107). At the end of the external collar (306) away from the pressure transmission rod (301), a plurality of inclined short rods (310) are hinged. One end of the plurality of inclined short rods (310) slides through a limiting slide rail (311). Connected to one side of the vent plate (107), the bottom end of the outer collar (306) is fixedly connected to a limiting friction block (307). The gradually forming sponge expands and squeezes the pressure push block (309). The pressure push block (309) uses the friction between the limiting friction block (307) and the inner limiting ring (308) to offset the impact below. The top of the pressure push block (309) is fixedly connected to a plurality of air guide push blocks (312) corresponding to the vent hole (108). The pressure push block (309) drives the pressure transmission rod (301) to move upward through the outer collar (306). It also includes a surface-sprayed flame-retardant sponge, comprising a first insulation layer, a flame-retardant layer, an antibacterial layer, two puncture-resistant layers, and a second insulation layer. The first insulation layer, the flame-retardant layer, the antibacterial layer, the puncture-resistant layer, and the second insulation layer are all made of ammonium polyphosphate, and ammonium polyphosphate flame retardant is added to the ammonium polyphosphate. The assembly sequence of the surface-sprayed flame-retardant sponge is composed of one puncture-resistant layer, the first insulation layer, the flame-retardant layer, the antibacterial layer, the second insulation layer, and another puncture-resistant layer, all achieved by spraying adhesive. Solid perlite material is added to the first and second insulation layers, antibacterial foamed polyurethane is added to the antibacterial layer, and wood cellulose fiber is added to the two puncture-resistant layers.
2. The processing technology of a surface-sprayed flame-retardant sponge according to claim 1, characterized in that, The outer surface of the inclined short rod (310) is fixedly connected to a limiting ring (305), and the outer surface of the limiting ring (305) is fixedly connected to a plurality of long strips (302). The end of the long strip (302) facing the ventilation plate (107) is fixedly connected to a long tube (303), and the bottom end of the long tube (303) is slidably connected to a hollow tube (304). The hollow tube (304) is fixedly connected to the top of the ventilation plate (107).
3. The processing technology of a surface-sprayed flame-retardant sponge according to claim 2, characterized in that, The foamed sponge assembly (1) includes a foamed sponge box (101), which is fixedly installed at the bottom of the ventilation plate (107). A demolding template (106) is slidably connected to the bottom of the foamed sponge box (101). Side plates (103) are fixedly installed on both sides of the foamed sponge box (101). When the worker twists the bolt buckle (104), the bolt buckle (104) is disengaged from the placement groove (102), causing the demolding template (106) to be unpositioned, and the molded sponge can be quickly demolded. One end of the placement groove (102) is connected to the bolt buckle (104) by a thread. A connecting rod (105) is rotatably connected to one side of the bolt buckle (104). The connecting rod (105) is fixedly installed on one side of the demolding template (106).
4. The processing technology of a surface-sprayed flame-retardant sponge according to claim 3, characterized in that, The pressure valve assembly (2) includes a sealing ring (202), which is fixedly installed on the side plate (103). A forward and reverse motor (201) is rotatably connected to the inner side of the sealing ring (202). The forward and reverse motor (201) is located inside the foamed sponge box (101) and is fixedly connected to an inner ring (213). A slide block (212) is fixedly connected inside the inner ring (213). A movable plate (211) is slidably connected to the inner side of the slide block (212). An inclined plate (210) is hinged to the inner side of the movable plate (211). A pressure rod (206) is hinged to one side of the inclined plate (210).
5. The processing technology of a surface-sprayed flame-retardant sponge according to claim 4, characterized in that, A valve (204) is slidably connected to the end of the pressure rod (206) away from the reversible motor (201). The valve (204) is slidably connected to the inner wall of the foamed sponge box (101). A sponge molding plate (203) is fixedly connected to the end of the pressure rod (206) away from the reversible motor (201). The sponge molding plate (203) is slidably connected to the foamed sponge box (101) via a slide rail. An internal block (208) with a pressing groove (209) on its surface is threadedly connected to one side of the valve (204). A connecting rod (207) that matches the pressing groove (209) is fixedly connected to the outside of the pressure rod (206).
6. The processing technology of a surface-sprayed flame-retardant sponge according to claim 5, characterized in that, Includes the following steps: S1: Select ammonium polyphosphate, solid perlite material, antibacterial polyurethane foam and wood cellulose and process them separately according to the requirements of the first insulation layer, flame retardant layer, antibacterial layer, two puncture-proof layers and the second insulation layer. At the same time, add ammonium polyphosphate flame retardant inside the above materials. S2: Mix the above materials evenly to ensure that the flame retardant properties are evenly distributed throughout the entire sponge structure; S3: The mixed raw materials are layered and fed into the mold for molding. The material is added into the foaming sponge box (101) according to the requirements. The pressure pusher (309) drives the pressure transmission rod (301) to move upward through the external collar (306), causing the sealing sheet (109) to bloom and gradually give up blocking the vent (108). Air is gradually introduced into the foaming sponge box (101) according to the expansion degree of the sponge. S4: Next, the flame-retardant sponge after molding is cured. The sponge molding plate (203) is subjected to the pressure of the sponge foam expansion and moves outward along the sponge molding plate (203) under the elastic limit of the spring (205). The sponge molding plate (203) drives the pressure rod (206) to move towards the pressing groove (209). The valve (204) moves outward through the threaded lead, completely opening the valve and relieving the internal pressure. S5: To increase the durability and aesthetics of the flame-retardant sponge, each surface is sprayed with adhesive in the following order: a puncture-resistant layer, a first insulation layer, a flame-retardant layer, an antibacterial layer, a second insulation layer, and another puncture-resistant layer to complete the multi-layer flame-retardant sponge. S6: Cut the finished sponge according to the model requirements and package the cut sponge.